Yellow Sally Stonefly vs Light Cahill Mayfly
Side-by-side species comparison
| Attribute | Yellow Sally Stonefly | Light Cahill Mayfly |
|---|---|---|
| Scientific Name | Isoperla grammatica | Heptagenia solitaria |
| Order | Plecoptera | Ephemeroptera |
| Family | Perlodidae | Heptageniidae |
| Size | 8-14 mm | 9-13 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
Yellow Sally Stonefly
A common European stonefly with a distinctive yellow body, emerging in late spring on clean rivers. It is a well-known species among European fly anglers.
Did You Know?
Yellow sally stoneflies drum their abdomens on surfaces to produce vibrations that attract mates, a behavior unique to stoneflies.
Light Cahill Mayfly
A pale-colored mayfly highly prized by fly fishers for imitating hatches. Nymphs prefer moderate current over gravel substrates.
Did You Know?
The Light Cahill dry fly pattern, designed to mimic this species, has been used since the 1880s.